Light bar



FIG. 1 is a perspective view from the top of a light bar embodying the invention;

FIG. 2 is a top plan view thereof;

FIG. 3 is an elevational view from the front thereof, the back elevation view thereof being identical thereto;

FIG. 4 is a right end view thereof, the left end view thereof being identical thereto; and,

FIG. 5 is a bottom plan view thereof.

The dashed lines in FIG. 5 are for mounting purposes only and form no part of the claimed design. 

The ornamental design for a light bar, as shown and described. 